Tuning on the dyno, PIDs to log...

[BlackGMC]

I will be doing some tuning on dyno this weekend to get my timing figured out and get a decent baseline before I start internal engine modifications.. I was wondering what PIDs you guys are using. I am on COS3 so I don't need any MAF PIDs, all NA, no Nitrous or boost. Thanks in advance, OH and I will be using my wideband for AFR readings...

[joecar]

Log these:

GM.DYNCYLAIR_DMA
GM.DYNAIR
GM.AFR
GM.KR

SAE.SPARKADV
SAE.IAT
SAE.ECT
SAE.MAP
SAE.RPM
SAE.TP
SAE.VSS

If running CL:
SAE.LONGFT1
SAE.LONGFT2
GM.HO2S11
GM.HO2S21

If running A4:
GM.GEAR
GM.TCCMODE
GM.TFT
GM.TFMPRS

Those add up to 23 channels.


And your wideband CALC AFR and CALC BEN pids (those don't use any channels).


Keep your channel count no greater than 24 (see bottom of PIDs tab).

Cheers,
Joe

[joecar]

...I am on COS3 so I don't need any MAF PIDs, all NA, no Nitrous or boost...

Any of these mode combinations can be run with any OS:
OLSD
OLMAF
CLSD
CLMAF

Running a COS also lets you run these modes (in addition to the above):
SOLSD
SOLMAF

(SOL = semi open loop, where B3647 cells are set to stoich AFR).

So running a COS does not imply you're running any paritcular mode... just so you know.

Cheers
Joe

[BlackGMC]

Thanks, I will be in open loop, and I talked to the owner and we decided to do 2nd gear pulls, cause I did not want to spin my truck up to 140+, so that means my TC will be unlocked...

[BlackGMC]

So running a COS does not mean you're running any paritcular mode... just so you know.

Cheers
Joe

I know, actually the MAF is sitting on my shelf in my garage!! Thanks for the input Joe!

[BlackGMC]

What about Injector Duty Cycle?

[joecar]

To log injector duty cycle, you have to log these:
GM.IBPW1
GM.IBPW2

That's 4 channels (you would have to remove some other pids).


Then include these (these use the 2 pids above and SAE.RPM):
CALC.INJDC1
CALC.INJDC2

Those use no channels.


Thanks, I had forgot about those.

[BlackGMC]

To log injector duty cycle, you have to log these:
GM.IBPW1
GM.IBPW2

That's 4 channels (you would have to remove some other pids).


Then include these (these use the 2 pids above and SAE.RPM):
CALC.INJDC1
CALC.INJDC2

Those use no channels.


Thanks, I had forgot about those.

Could I just log 1 of the injector pulse width PIDS instead of both? They should be reading roughly the same correct?

[joecar]

Yes, you could just log 1 set.